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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | 4 // |
5 // THREAD SAFETY | 5 // THREAD SAFETY |
6 // | 6 // |
7 // AlsaPcmOutputStream object is *not* thread-safe and should only be used | 7 // AlsaPcmOutputStream object is *not* thread-safe and should only be used |
8 // from the audio thread. We DCHECK on this assumption whenever we can. | 8 // from the audio thread. We DCHECK on this assumption whenever we can. |
9 // | 9 // |
10 // SEMANTICS OF Close() | 10 // SEMANTICS OF Close() |
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27 // been entered, if Open() has previously returned successfully, Close() must be | 27 // been entered, if Open() has previously returned successfully, Close() must be |
28 // called to cleanup the ALSA devices and release resources. | 28 // called to cleanup the ALSA devices and release resources. |
29 // | 29 // |
30 // When |stop_stream_| is set, no more commands will be made against the | 30 // When |stop_stream_| is set, no more commands will be made against the |
31 // ALSA device, and playback will effectively stop. From the client's point of | 31 // ALSA device, and playback will effectively stop. From the client's point of |
32 // view, it will seem that the device has just clogged and stopped requesting | 32 // view, it will seem that the device has just clogged and stopped requesting |
33 // data. | 33 // data. |
34 | 34 |
35 #include "media/audio/alsa/alsa_output.h" | 35 #include "media/audio/alsa/alsa_output.h" |
36 | 36 |
| 37 #include <stddef.h> |
| 38 |
37 #include <algorithm> | 39 #include <algorithm> |
38 | 40 |
39 #include "base/bind.h" | 41 #include "base/bind.h" |
40 #include "base/logging.h" | 42 #include "base/logging.h" |
41 #include "base/stl_util.h" | 43 #include "base/stl_util.h" |
42 #include "base/trace_event/trace_event.h" | 44 #include "base/trace_event/trace_event.h" |
43 #include "media/audio/alsa/alsa_util.h" | 45 #include "media/audio/alsa/alsa_util.h" |
44 #include "media/audio/alsa/alsa_wrapper.h" | 46 #include "media/audio/alsa/alsa_wrapper.h" |
45 #include "media/audio/alsa/audio_manager_alsa.h" | 47 #include "media/audio/alsa/audio_manager_alsa.h" |
46 #include "media/base/channel_mixer.h" | 48 #include "media/base/channel_mixer.h" |
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792 } | 794 } |
793 | 795 |
794 // Changes the AudioSourceCallback to proxy calls to. Pass in NULL to | 796 // Changes the AudioSourceCallback to proxy calls to. Pass in NULL to |
795 // release ownership of the currently registered callback. | 797 // release ownership of the currently registered callback. |
796 void AlsaPcmOutputStream::set_source_callback(AudioSourceCallback* callback) { | 798 void AlsaPcmOutputStream::set_source_callback(AudioSourceCallback* callback) { |
797 DCHECK(IsOnAudioThread()); | 799 DCHECK(IsOnAudioThread()); |
798 source_callback_ = callback; | 800 source_callback_ = callback; |
799 } | 801 } |
800 | 802 |
801 } // namespace media | 803 } // namespace media |
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